format
* v0.5.0  [dev] 2012-11-07 a new version is begin, it will delete slave script, auto load account info from db never need setup manual.
restructure code
restructure code
delete slave script & rename master script
v0.5.1  [dev] 2012-11-15 finished price information display part;
v0.5.2  [dev] 2012-11-15 finished diff indicator calculat or hightest and lowest price;
v0.5.3  [dev] 2012-11-15 fix calculate diff indicator bug;
fix sql error
v0.5.4  [dev] 2012-11-15 it's a runable version and there are some bugs too;
change default safe margin level rate
Finish release-1